版本：cocos creator v2.4.0
在使用物理碰撞的时候，两个物体还在接触阶段，但是改变方向却会重复触发onBeginContact和onEndContact。
如图：
会出现这种情况的原因是改变了节点的 scaleX。（这个应该是BUG吧？）
代码：
const { ccclass, property } = cc._decorator;
@ccclass
export default class NewClass extends cc.Component {
_body;
start() {
this._body = this.getComponent(cc.RigidBody);
this._body.enabledContactListener = true;
// 测试绘制
cc.director.getPhysicsManager().debugDrawFlags = cc.PhysicsManager.DrawBits.e_aabbBit |
cc.PhysicsManager.DrawBits.e_jointBit |
cc.PhysicsManager.DrawBits.e_shapeBit
;
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
}
onBeginContact(contact, selfCollider, otherCollider) {
cc.log("接触物体");
}
onEndContact(contact, selfCollider, otherCollider) {
cc.log("离开物体");
}
onKeyDown(event: cc.Event.EventKeyboard): void {
switch (event.keyCode) {
case cc.macro.KEY.left:
case cc.macro.KEY.d:
this.moveCtrl(1);
break;
case cc.macro.KEY.right:
case cc.macro.KEY.a:
this.moveCtrl(-1);
break;
}
}
onKeyUp(event: cc.Event.EventKeyboard): void {
let v = this._body.linearVelocity;
v.x = 0;
this._body.linearVelocity = v;
}
moveCtrl(direct: number) {
let v = this._body.linearVelocity;
v.x = 300 * direct;
this._body.linearVelocity = v;
// 问题所在：改变水平翻转时，会触发onEndContact和onEndContact，实际上两个物体还是接触状态
this.node.scaleX = direct;
cc.log("移动：" + direct);
}
}
